Hi Yoshi, I'm not sure what you mean by breakdown voltage- do you mean the electrostatic pull-in voltage, or do you mean the maximum voltage before electrostatic discharge? Both are relevant to MEMS, and both have simple equations that are fairly easy to find in the literature. Jason Milne PhD Candidate Microelectronics Research Group School of Electrical, Electronic and Computer Engineering The University of Western Australia -----Original Message----- From: mems-talk-bounces@memsnet.org [mailto:mems-talk-bounces@memsnet.org] On Behalf Of Yoshi.Sakata_Gmail Sent: Friday, 14 August 2009 7:43 AM To: mems-talk@memsnet.org Subject: [mems-talk] Breakdown Voltage Hi All, I'm going to estimate the breakdown voltage of both the parallel plate type actuator and comb drive actuator. Anybody have the idea to estimate? Thanks, Yoshi